Typewriter eraser



Jan. 13, 1931. c. c c R so 1,788,658

TYPEWRITER ERAS ER Filed May 15, 1929 gear and eraser carried thereby,there has been provided a shaft or stem 11 which is rotatably receivedin an opening 12 formed inthe wall 6 rearwardly fromthe post and uponthe inner end portion of this shaft is fixed a large gear 13. The gear13 meshes with-the gear? and when the shaft is turned a through'themedium of its turning head 14.

,rotary motion will beimparted tothe gear 7 and erasericarriedthereby ata higher rate .of speed than the shaft'll rotates; a'Th inner portion ofthe eraser extends across the adjacent side portion of the gear, and byan in spection of Figure 3 itwill be readily seen that, when the, wall 2has been'removed, the

eraser and gear 7 may be very easily detached I from the post bythrusting the shaft 11 inwardly so that it applies pressure totheeraser'gand forces it off the post. Therefore, the eraser and its gearcan be very easily removed when it is necessary to substitute aneweraser for one which has become worn to such an extent that itis nolonger serviceable.

. The guide orshield 15 is also perferably tformedofmetal and thisshield is rectangularin' form, and of such width and thickness that itfits snugly in the casing, as shown in Figures 2 and8,with its sidebars16 bearing against themarginal walls 17 of the casing.

The inner cross bar 18 of the shield carries eyes 19 which projectforwardly and to these eyes are attached springs 20 which extend jforwardly across opposite side portions of the gear. 13 and have their'forward ends engaged about pins '21 carried by the wall 6 of the casing.These springs drawfthe shield forwa-rdlyso that the'side bars 16normally project outwardly from the casing, as shown in .Figures'ljan-d3, but allow the shield to be I 4 pressed inwardly, as shown in Figure2, so

that the outer portion of the eraser .9 extends through a slot 22 formedlongitudinally in the central portion of the cross bar 23 at the outer awith .a' sheetof paper. upon which an erasure endqof the shield. This.out-er .cross baror stripQQ is curved longitudinally and bowed 'inwardlyso that it conforins to the curvature of a typewriter roller and,therefore, this strip may haveclose contacting engagement isjto be made,and in the preferred construction'the slot or opening will-only be ofsufficientwidth to expose a single letter. Therefore, asingle letterwill be exposed so that' itmay .beerased and letters at opposite sidestl1ereof will be covered and prevented from .being partially or entirelyerased during an I eraslngyoperation.

' llVhen this1erasingfldevice is in use, the. casing is heldfbetween thethumb and fingers of one hand and the outer strip or crossbar 23 of theshield-appliedtoa sheet of paper transversely of the typewriter roller.vThe strip 23 its fiat against the sheet offpape'r as it conforms topthecurvature of the typewriter roller andialetterto be erased will beexposed through the opening 22. After the outer cross bar of the shieldhas been properly applied to the sheet of paper the casing is pressedforwardly against the action of the springs. 20 until the eraser passesthrough the opening 22, as shown in Figure 2, and bears against theletter tobe erased. The turninghead 14 is graspedbetween the thumbandhngerofthe other hand and rotary plete erasure has not beenmade thecasing can be again pressed forwardly and the erasing operationrepeated. In view of the fact that letters at opposite sides 'ofa letterto be erased rwill be covered by portions of the cross bar at oppositesides of theop'ening, only a single "letter will be erased and blurring.of adjacent letters will be prevented. I have,

therefore,-provided a typewriter eraser which will be very easy tooperate andj'will bevery efficient in its operation, I have furtherprovided Ian ,erasingdevice having an eraser which can be easily removedwhen worn out and a newone substituted. I V

7 Having thus described the invention, .1 claim:

1. A typewriter erasing device comprising a casing .open atone end, ashield slidable into and out of said casing, and having side 'bars oinedat their outer .endsby a cross strip, the :cross' strip being .bowed tofit against a typewriter roller and intermediate its length and widthformed with a longitudinally extending slot to expose a character whenthe cross strip is disposed against ,apaper, an eraser rotatablymountedin said casing betweenthe side barsof the shield and projectingout of. the open end of the casing and adapted to pass through the'slotinthe cross strip of the shield when the shield is moved inwardly to anoperative positionQmeanS to rotatesald eraser, and means yieldably'refsistlnginward movement of said shield.

- 2. A typewriter erasing device comprising a casing open at oneend, ashieldslidable into acter when the shield is disposed against a 7 paper,a post insaid casing, a gear rotatable upon said post, an eraser fixedto said gear .and out, of said-casinggand having its outer end formedwith an opening to expose a charabout said post and projecting throughthe 0pen 'end'of thecasing, a shaft rotatable through a-wall'of said.casing,i a gear upon the inner endof said shaft meshing with the firstgear to'impart rotation to thefirst gear and eraser when the shaft isrotated, and:

'means in said casing yieldably resisting inward movement of'saidvshield.

3. A typewritererasing device comprising a casing open at one end, ashield ,slidable into and out of said'casing and havingfits outer endformed with an opening to expose a character when'the shield is disposedagainst a paper, a post in said casing. a gear rotatable upon said post,an eraser fitting 1 against said gearabout said post. and projectingthrough the open end of said casing,

pins extending from said gear intosaideraser to anchor. the eraser tothe gear, a shaft rotatable through a Wall of said casing, a gearupon'the innerend of said shaft meshing with the first gear to'impartrotation to the first gear and eraser-When the shaft is. r-

. tated. and means in "said easing yieldably 'reslstmginward'movement ofsald shleld.

4. An'erasing devlce comprlsmg a casing open at one end, a shieldslidable into and out-ofsaid casing and having side bars and inner andouter cross barsoonnecting ends H of its slde bars, the outer cross barbeing formed wlth on opening to expose a char-' acter to be erased-,aneraser rotatably mounted in said casing between the side arms of saidshield and projecting from the open 7 s end of the casing to extendthrough the o 'opening in theouter cross bar when the shield isforeedinwardly, resilient means in said casing engaged with the lnnercross bar-.t0

yieldably resist inward movement of said i,

shield and means to rotate said eraser.

In testimony whereof I afiix my signature.

CHRIS o. OARLSON. 1i 8.] p T

